ZJQ Type Submersible Slurry Pump

The ZJQ type submersible slurry pump, also known as a submersible slurry pump, is a single-stage single-suction vertical centrifugal slurry pump where the motor and the pump are integrated coaxially and the entire machine operates underwater. It does not "suck up" the slurry through suction height; instead, it directly submerges the working components into the material, adheres to the sediment surface, and actively agitates, pushes out, and discharges the abrasive slurry containing sand, tailings, coal cinders, and silt.

Pure copper motor with copper core coils, stable speed and low noise, ensuring safety
Thickened non-clogged impeller, made of high-chromium alloy material with an open design, preventing particle clogging
Built-in bottom stirring wheel at the bottom, bottom stirring wheel design
Stir up the sediment that has sunk to the bottom of the water

1) Power transmission: The motor and the pump are integrated coaxially.
Three-phase alternating current is sent through heavy-duty waterproof rubber-covered cables to the submersible three-phase asynchronous motor (usually with F-class insulation and IP68 protection). The motor rotor drives the pump shaft to rotate directly - the lower end of the pump shaft is equipped with the main impeller and the bottom stirring impeller, and the upper end is centered by a bearing assembly. The entire shaft is a vertical rotating core, without a coupling, without a long shaft, and without a ground transmission foundation.
2) Bottom stirring: Turning "dead materials" into "live slurry"
This is the key difference between ZJQ and ordinary submersible sewage pumps/submersible pumps - the lowest end of the main shaft is equipped with a stirring impeller (mixing wheel), which rotates synchronously with the shaft, working closely against or near the bottom of the pool/riverbed sediment surface. Its function is not "pumping", but to stir the compacted sludge, tailings, and coal slimes into a turbulent suspended state, allowing solid particles to re-suspend and reach a concentration range that can be captured by the main impeller.
In other words: Without this stirring wheel, after pumping for a long time, you can only get clear water; with it, the material near the pump inlet is always alive.
3) Centrifugal discharge of the main impeller: Semi-open/closed impeller → outlet
The suspended slurry is sucked in from the bottom of the pump body (or through the lateral suction inlet), enters the main impeller for work, gains kinetic energy and pressure energy, and then converges into the volute-type discharge chamber, finally being discharged from the vertical upward outlet flange into the slurry discharge pipe, and transported to the destination (outside the sedimentation tank, on the wharf, before the filter press, in the transfer tank, etc.).

Motor section (upper part · dry sealing chamber)
Dry structure: The motor cavity does not directly come into contact with the slurry. It is sealed by multiple levels of seals and an oil chamber to keep the "water" out. The stator, rotor, upper and lower bearings, motor housing, junction box, and cable cover form a closed system.
Sealing and oil chamber section (middle· core defense line)
Double independent mechanical seals (in series arrangement): The first seal faces the slurry inside the pump, and the second seal faces the motor side; the space between the two seals is the oil chamber, which is filled with lubricating oil. When the first seal fails, the oil chamber acts as a buffer zone - the medium enters the oil chamber instead of directly entering the motor, and the oil continuously lubricates and cools the sealing surface.
Pump body and flow components (middle· working core)
Casing (pump body): Collects the slurry thrown out by the impeller and guides it to the outlet. The inner wall is often lined with wear-resistant linings/protective plates, which can be replaced separately when worn, without damaging the pump body itself.
Main impeller: Mostly adopts semi-open or closed high-chrome alloy impellers. The number of blades, outlet width, and inlet throat must provide sufficient channels for "over solids", rather than pursuing the extreme specific speed of a water pump.
Flow component materials: The mainstream is high-chrome cast iron (such as KmTBCr26 / Cr27 / Cr30 series) or modified high-chrome alloys. The high-hardness martensitic matrix resists micro-cutting wear by quartz sand, tailings, and coal slag; optional stainless steel variants can be selected to cope with mild corrosive slurry.
Bottom stirring wheel/ homogenizing wheel is installed at the shaft end, with blades in a radial or curved shape. When rotating, it generates strong bottom sweeping and shear flow, re-scattering and suspending the compacted sediment. Some models also have a grid-like base/filter skirt at the bottom to prevent large stones from directly entering and blocking the impeller, while allowing sand particles and slurry to pass through.

Mines/Processing Plants: Regular bottom cleaning and drainage of sedimentation ponds, tailings dam return water pits, and slurry transfer pits in the processing plant; temporary pumping of tailings in the tailings recovery line.
Coal Mines: Coal sludge drainage from above and below the mine, coal ash removal (note the explosion-proof grade requirements, and only a mine-used explosion-proof version is qualified for going underground).
Power Plants: Ash discharge from the sedimentation tank, auxiliary drainage by the hydraulic ash removal system, cleaning of the coal ash sedimentation tank.
Steel Mills: Water sludge from the blast furnace, iron oxide scale slurry from steel rolling.
River/Lake/Harbor Dredging: Beach filling along the riverbank, port wharf basin dredging, sand pumping operations - The ZJQ system with a suspended excavator "scanning" along the bottom surface is a typical mobile dredging mode.
Municipal/Environmental Protection： Sedimentation ponds of sewage plants, collection pits of rainwater pumps stations, shield mud water, construction site slurry pits, water washing slurry from quarries.

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